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SIB SW-10-41 : Honeywell MK XXII Enhanced Ground Proximity Warning System (EGPWS) Software Problem

Number SW-10-41
Issued by United States of America  United States of America
Issue date 2010-08-09
Effective date
EASA approval number
ATA Chapter
Approval Holder
/ Type Designation
  • Safety Information Bulletin
    • Airworthiness
      • Equipment
Revision Not applicable
Correction Not applicable
Supersedure None
Publication(s) and related information Service Information Letter (Publication Number D201004000029), dated April 16, 2010, stating that the MK XXII EGPWS used in helicopters will experience an unannunciated loss of the Terrain Awareness Warning System (TAWS) aural alerting function if the radio altimeter is in either the no computed data (NCD) state or the radio altimeter data invalid state at takeoff.
Remarks Comments regarding this safety information should be referred to the Safety Information Section, Certification Directorate, EASA;
E-mail: ADs [at] easa.europa [dot] eu

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